/**
 * (C) Copyright IBM Corp. 2010, 2015
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 */

package com.ibm.bi.dml.yarn.ropt;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;

import com.ibm.bi.dml.hops.HopsException;
import com.ibm.bi.dml.runtime.DMLRuntimeException;
import com.ibm.bi.dml.runtime.controlprogram.ProgramBlock;

/**
 * Composite overlay of hybrid and exp grid.
 * 
 */
public class GridEnumerationHybrid extends GridEnumeration
{
	
	public GridEnumerationHybrid( ArrayList<ProgramBlock> prog, long min, long max ) 
		throws DMLRuntimeException
	{
		super(prog, min, max);
	}
	
	@Override
	public ArrayList<Long> enumerateGridPoints() 
		throws DMLRuntimeException, HopsException
	{
		GridEnumeration ge1 = new GridEnumerationMemory(_prog, _min, _max);
		GridEnumeration ge2 = new GridEnumerationExp(_prog, _min, _max);
		
		//ensure distinct points
		HashSet<Long> hs = new HashSet<Long>();
		hs.addAll( ge1.enumerateGridPoints() );
		hs.addAll( ge2.enumerateGridPoints() );
		
		//create sorted output list
		ArrayList<Long> ret = new ArrayList<Long>();
		for( Long val : hs )
			ret.add(val);
		Collections.sort(ret); //asc
		
		return ret;
	}
}
